#279 dirname(__FILE__) Returns bad path

[Bill Essig]

// configuration file for PHPOpenChat
// will be included by almost all source files
define('POC_BASE', dirname( __FILE__ ));

I echo POC_BASE and it returns / instead of where it
actually is /phpopenchat

so all the graphics are missing and other things are wrong.

I tried changing it to

// configuration file for PHPOpenChat
// will be included by almost all source files
define('POC_BASE', '/phpopenchat');

and numerous other things, but EVERYTIME, it will
return a blank page, no source code or anything...

HELP?

-William E. Essig